// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/appcache/chrome_appcache_service.h"

#include "base/files/file_path.h"
#include "base/profiler/scoped_tracker.h"
#include "content/browser/appcache/appcache_storage_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/resource_context.h"
#include "net/base/net_errors.h"
#include "net/url_request/url_request_context_getter.h"
#include "storage/browser/quota/quota_manager.h"

namespace content {

ChromeAppCacheService::ChromeAppCacheService(
    storage::QuotaManagerProxy* quota_manager_proxy)
    : AppCacheServiceImpl(quota_manager_proxy)
    , resource_context_(NULL)
{
}

void ChromeAppCacheService::InitializeOnIOThread(
    const base::FilePath& cache_path,
    ResourceContext* resource_context,
    net::URLRequestContextGetter* request_context_getter,
    scoped_refptr<storage::SpecialStoragePolicy> special_storage_policy)
{
    // TODO(pkasting): Remove ScopedTracker below once crbug.com/477117 is fixed.
    tracked_objects::ScopedTracker tracking_profile(
        FROM_HERE_WITH_EXPLICIT_FUNCTION(
            "477117 ChromeAppCacheService::InitializeOnIOThread"));
    DCHECK_CURRENTLY_ON(BrowserThread::IO);

    cache_path_ = cache_path;
    resource_context_ = resource_context;

    // The |request_context_getter| can be NULL in some unit tests.
    //
    // TODO(ajwong): TestProfile is difficult to work with. The
    // SafeBrowsing tests require that GetRequestContext return NULL
    // so we can't depend on having a non-NULL value here. See crbug/149783.
    if (request_context_getter)
        set_request_context(request_context_getter->GetURLRequestContext());

    // Init our base class.
    Initialize(cache_path_, BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE_USER_BLOCKING).get(),
        BrowserThread::GetTaskRunnerForThread(BrowserThread::CACHE).get());
    set_appcache_policy(this);
    set_special_storage_policy(special_storage_policy.get());
}

bool ChromeAppCacheService::CanLoadAppCache(const GURL& manifest_url,
    const GURL& first_party)
{
    DCHECK_CURRENTLY_ON(BrowserThread::IO);
    // We don't prompt for read access.
    return GetContentClient()->browser()->AllowAppCache(
        manifest_url, first_party, resource_context_);
}

bool ChromeAppCacheService::CanCreateAppCache(
    const GURL& manifest_url, const GURL& first_party)
{
    DCHECK_CURRENTLY_ON(BrowserThread::IO);
    return GetContentClient()->browser()->AllowAppCache(
        manifest_url, first_party, resource_context_);
}

ChromeAppCacheService::~ChromeAppCacheService() { }

void ChromeAppCacheService::DeleteOnCorrectThread() const
{
    if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
        delete this;
        return;
    }
    if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
        BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
        return;
    }
    // Better to leak than crash on shutdown.
}

} // namespace content
